A、<img src="http://s3.qsxt.info/exams/201906/3ff92ec4-8f6d-488a-92e9-46b2a19b3189.png"/>
B、<img src="http://s3.qsxt.info/exams/201906/db4065d7-9c9e-44aa-b0fc-cb49066fdeed.png"/>
C、<img src="http://s3.qsxt.info/exams/201906/9f227ade-1f9b-42e5-becd-2c6b7b67a3ef.png"/>
D、<img src="http://s3.qsxt.info/exams/201906/70e347ec-5b41-49a7-995d-3a6532065bb4.png"/>
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